Some contributions to the examination of composites from power plant wastes
Doprinos proučavanju kompozita napravljenog od otpadnih materijala termoelektrana
Keywords:
fly-ash; bottom ash; flue gas desulphurization gypsum; road construction
Abstract
This paper describes an investigation into the possibilities of the use of all three types of solid power plant wastes: fly ash (FA), flue gas desulphurization gypsum (FGD gypsum) and bottom ash (BA) as components of composites for road construction. Two mixtures were made: 1. power plant wastes - Portland cement (PC) and 2. power plant wastes - sand (S) - Portland cement (PC). The mass ratio of components in these mixtures was: 1. FA - FGD gypsum - BA - PC = 2 : 1.5 : 5 : 1.5 and 2. FA- FGD gypsum-BA - S - PC= 2 : 1.5 : 4 : 1 : 1.5. For both mixtures, the compressive strength, the mineralogical composition, the water absorption and the resistance to freeze-thaw treatment were determined 7 and 28 days after preparation of samples (mixing with water). The obtained results showed that both mixtures could have potential to be used for sub-base layers in road construction and the second mixture (with natural aggregate-sand) has advantage over the first mixture in terms of compressive strength, mineralogical composition, and resistance to freeze-thaw treatment.References
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BAI, Y. and BASHEER, P.A.M. (2003) Influence of furnace bottom ash on properties of concrete. Structures and Buildings , 156 (1), pp.85-92.
BENAVIDEZ, E. et al. (2003) Densification of ashes from a thermal power plant. Ceramics International , 29 (1), pp.61-68.
CHEN, D. et al. (2007) Carbonation of low heat portland cement paste precured in water for different time. Journal of University of Science and Technology Beijing , Mineral, Metallurgy, Material , 14 (2), pp.178-184.
CHERIAF, M. et al. (1999) Pozzolanic properties of pulverized coal combustion bottom ash. Cement and Concrete Research , 29 (9), pp.1387-1391.
FERNÁNDEZ, B. M. et al. (2004) A review of accelerated carbonation technology in the treatment of cement-based materials and sequestration of CO 2 . Journal of Hazardous Materials , 112 (3), pp.193-205.
FREIDIN, C. and MOTZAFI-HALLER W. (1999) Cementless building units based on oil shale and coal fly ash binder. Construction and Building Materials , 13 (7), pp.363-369.
GARCIA-GONZALES, C. A. et al. (2006) Modification of composition and microstructure of Portland cement pastes as a result of natural and supercritical carbonation procedures. Industrial & Engineering Chemistry Research , 45 (14), pp.4985-4992.
HOLLY, R. et al. (2006) Magnetic resonance in situ study of tricalcium aluminate hydration in the presence of gypsum. Journal of the American
Ceramic Society , 89 (3), pp.1022-1027.
JOHANNESSON, B. and UTGENANNT, P. (2001) Microstructural changes caused by carbonation of cement mortar. Cement and Concrete Research, 31 (6), pp.925-931.
MANZ, O. E. (1999) Coal fly ash: a retrospective and future look. Fuel , 78 (2), pp.133-136.
MCCARTHY, M.J. and DHIR, R.K. (1999) Towards maximising the use of fly ash as a binder. Fuel , 78 (2), pp.121-132.
POON, C.S. et al. (2001) Activation of fly ash/cement systems using calcium sulfate anhydrite (CaSO 4 ). Cement and Concrete Research , 31 (6), pp.873-881.
VALLS, S. and VÀZQUEZ, E. (2001) Accelerated carbonatation of sewage sludge-cement-sand mortars and its environmental impact. Cement and Concrete Research , 31 (9), pp.1271-1276.
Published
2015-12-31
How to Cite
Trifunović, P., Marinković, S., & Tokalić, R. (2015). Some contributions to the examination of composites from power plant wastes. Podzemni Radovi, (27), 41-48. https://doi.org/10.5937/podrad1527041T
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